.m-dropdown {
  position: relative;
}
.m-dropdown .m-dropdown-panel {
  position: absolute;
  background-color: #fff;
  max-height: 400px;
  overflow: auto;
  box-shadow: 0 3px 5px rgba(0, 0, 0, 0.06);
  cursor: default;
}
.m-dropdown .m-dropdown-panel.is-center {
  left: 50%;
  transform: translateX(-50%);
}
.m-dropdown .m-dropdown-panel.is-right {
  right: 0;
}
.m-dropdown .m-dropdown-panel.is-left {
  left: 0;
}
.m-css-dropdown {
  position: relative;
}
.m-css-dropdown .m-css-dropdown-panel {
  position: absolute;
  background-color: #fff;
  max-height: 400px;
  overflow: auto;
  box-shadow: 0 3px 5px rgba(0, 0, 0, 0.06);
  display: none;
  cursor: default;
}
.m-css-dropdown .m-css-dropdown-panel.is-center {
  left: 50%;
  transform: translateX(-50%);
}
.m-css-dropdown .m-css-dropdown-panel.is-right {
  right: 0;
}
.m-css-dropdown .m-css-dropdown-panel.is-left {
  left: 0;
}
.m-css-dropdown:hover .m-css-dropdown-panel {
  display: block;
}
.m-dropdown-enter-active {
  animation: slide-down-in 0.3s;
}
.m-dropdown-leave-active {
  animation: slide-up-out 0.3s;
}
@keyframes slide-down-in {
  0% {
    transform: translate3d(0, -20px, 0);
    opacity: 0;
  }
  100% {
    transform: translate3d(0, 0, 0);
    opacity: 1;
  }
}
@keyframes slide-up-out {
  0% {
    transform: translate3d(0, 0, 0);
    opacity: 1;
  }
  100% {
    transform: translate3d(0, -20px, 0);
    opacity: 0;
  }
}
